Safety-guard for centrifugal extractors.



W. BARTHOLOMEW, J. F. BRODERGK a P. BALZER.

SAFETY GUARD FOB- CEN'I'RIFUGAL BXTRAOTORS.

l .rrmmmm NLE;- Pr 18,1913, Patented Dec'8'1914.

2 SHEETS SHEET l f Y i Y. a

f ,Y Q. 5 S E W. BARTHOLOMEW, J. F. BRODERXGK .SL E. BALZER. SAFLTY GUARD mi CENTRHUGAL BXTRACTORS 2 BBEBTSYSHEBT 2v UNITED STATES PATENT OFFICE.

WILLIAM BARTHOLOMEW. JAMES E. BRODERICK. AND FRITZ BALZER, OF CHICAGO.

ILLINOIS, ASSIGNORS TO TROY LAUIJDRY MACHINERY COMPANY. LTD., OF C111- CAGO, ILLINOIS, A CORPOR-'I'IONl OF NEW YORK.

SAFETY-GUARD FOR CEN'IRIUGAL X'IRACTORS.

Specification of Letters Patent.

Patented Dee 8, 1914.

Application filed Febluary 1B. 1:5513. Serial No. 749.140.

To all [clim/t it may concern:

Be it Known that we. lViLLiA .vi Balrrnoi.- onnvv and Janus l". thematiek, citizens of the llnited States, and Farm Bilzen. a subjctt ot' the lhnperor of Germany.l residing at Chicago. in the county of Cook and State oly Illinois. have invented certain new and useful lniprovemcnt in Safety-Guards for t`e-.itrit'ugal llxtractors.l ot' which the follow iner is a specification.

(')ur invention relates yin general to launr dry machinery. and more particularly to centrifugal extractors.

The high speed at which the baskets of centritiufal extractors are rotated renders their use dangerous to carelessy operators unless .such extraetors are provided with sa l'ety appliances for preventiing access to the baskets while they are rotatine'. ln order that such safety devices may tiilly protect they operators, it is necessary that access should be prevented to the baskets not only while the power is applied to rotate them, but atl ter the disconnection ot' the driving power and while the baskets continue to rotate by momentum at dangerous speeds.

The primary object of our invention is to provide a centrifugal extractor in which the cover must be locked in closed position when power is applied to rotate the basket, and in which the cover cannot be unlocked while the basket continues to rotate.

A further object of our invention is to provide a centrifugal extractor having a cover for preventing access to the rei'olving basket, in which power can only be applied to the basket after the cover has been locked, and in which the driving meansvvhich necessarily rotates while the basket rotatcs will be so connected with the cover that it cannot be opened until such driving means have ceased to move.

A further object ot our invention is to provide an improved centrifugal extractor. which will be simple in construction and operation. and the use ot' which will bel unattended by any possible injury to the ojerators.

Uur invention will be more tally disclosed hereinafter o ith iclcreicc to the accomv pany ing fir-avv ings1 in uhieh the same is illustrated as embodied in a convenient and practical torni. and in whichl `igure l is an elevational view; Figli. 2. an enlarged detail plan view; Fig. 3. au enlarged detail elevational view ot' the. cover lock: Fig. l. an enlarged detail elevational view ot the lock. looking,F Vtrom the right in Figi. il; Figf. 5. a detail elevational view on line '5 .'1. Fig. l. otl one otI the idler `guide pullclvfsl ot the drivin;r belt: and Fig. t3. a detail plan v'icw oli the idler pulley and aal jacent parts actuated thereby.

The saine ret'crcnce rharirsiers are used to designate thc same parts in die several tig urcs ot the dravv ings. Y(

ltctereiu-e letter indicates` the casing' ol' a centrifugal extractor in which is iuclosed the usual revolving basket a.

li deeignates a suitable support l'or the casing comprising .standards and a base adapted to be supported upon the tloor.

(l designates :t cover 'tor eloringy the top ol' the casino. thereby preventing access to the inclosed basket.

l) designates a vertical `spindle upon the upper end ot which the basket supported and to which power is applied tor rotating the same and thereby imparting:r rewlution to the basket.

(l designates a pulley secured concentricallv around the Spindle l) which is engined by a driving belt lil.

F designz'ltes one ot a pair of idler pulleys around which the belt ll passes and by which it is guided to thel pulley (l. ny suitable means tnot shown) may be provided for applying power to.y and disconnect power trom. the belt ll when it is desired to impart rotary motion to the basket or to discontinue the rotation olI the basket.

l designates a bracket suitably mounted upon the base b, as by menus ot' lugs 5,/ overAA lyinj;l and .secured to iluF base ol thc stand ard l. The lu'acket (l supports the pair ot idler pulleys. one ot which is de'iifnatcd l". \ny suitable means may bc provided tot V-ui`lably journaling the idler pulleys upcii the lira' l.et tl.

ecuscd to the Iruido pulley l*` are a serie; ol' lateral ystuds ll which may be ev-.nven ic'ntly lastcm-al to the spokes ol' the pulley.

Si (l itu' K designates a lever fulcrumed at L upon the outer end of the bracket G, and having a path of movement which will project one end thereof into the path of rotation of the studs H. The opposite end of the lever K is provided with a weight l.: which normally oscillates the lever K to a position out of the path of the studs Il, as shown in Fig. 5. A rod M is pivotally connected to the lever K intermediate of its fulcrum L and the pulley F. The upper end of the rod M is pivotally connected to the short arm of a bell crank lever N, the latter being fulcrumed at n. upon the rear outer surface of the u'aterguard a.

designates a bolt pivotally connected to the bell crank lever N by means of a. slot and pin connection, as shown in Fig. 3. The bolt 0 extends through and is guided by a pair of spaced lugs U and (,)2 secured to the water-ring a in any suitable manner, as by means of bolts and nuts o o2.

I designates a link pivotally connected at one end to a bracket p upon the rear edge of the cover C. The opposite end of the link l extends through an opening in .the Water-guard a intermediate of the spaced ears O and O2, and is pivotally connected to the upper end of a link R. The link R is suitably pivoted at its lower end upon the bracket S also Secured to the water ring a. The bracket S is shown as compris ing a pair of spaced ears s which rotatively support a pin 8' which surrounded by :1 sleeve 1' interposed between the spaced ears s and with which the link R is integrally formed.

The operation of: our invention is as fol lows: 1V hen the. cover is in its open position, as indicated in dotted lines in Fig. l, the link P isA reciprocated toward the rear by reason of the eccentric position of the bracket p With relation to the hinges c which pivotally connect the cover with the waterring A around the top of the casing A.

The position of the link P when the cover is raised moves the opening p in the link beyond the path of movement of the bolt 0 so that the bolt 0 when the cover is opened cannot be reciprocated toward the left in Fig. 3, as the end of the bolt engages the imperforate portion of the link between the guide ears O', O2 of the bolt. The bolt is thereby retained in the position shown in dotted llines in Fig, 3, and in such position the rod M is depressed and the detent lever K swung into such position that the end thereof is in the path of the studs H on the spokes of thie pulley F. The extractor, theref` r cannt be operated, inasmuch as oneiolg) tehe stu s H would engage the end of the detent lever K and thereby prevent the turning of the pulley and consequently prevent the movement of the belt relatively to the pulley on the basket spindle D. When the path of the studs H.

it is desired to rotate the basket after placing therein the articles to be treated, the cover C is closed, which moves the link P forwardly through the slot in the waterguard a' until the opening p in the link registers with the path of movement of the bolt 0. The bolt O is then moved toward the left in Fig. by applying pressure to the upper end oi. the bell crank lever N. This movement of the bolt causes the same to pass through the hole p and the link P thereby locking the cover closed. Such movement of the bolt O lifts the rod M, thereby oscillating the detent lever K so that the end thereof will be moved out of T he power may then be applied to the bolt as the idler pulley F may freely rotate Without the studs thereon engaging the end ot the detent lever. If, during the driving of the basket, an eifort should be made to unlock the cover by reciprocating the bolt (l toward the right in Fig. 3 to disengage it from the link P, such movement of the bolt will be prevented by the rapid engagement of the studs H with the end of the detent lever K.A The detent lever therefore cannot be moved in the direction necessary in order to permit the bolt to be disengaged from the link, thereby positively preventing the unlocking of the cover as long as the basket continues to revolve, inasmuch as the idler F must revolve coincidentally with the revolution of the basket owing to the engagement of the driving belt F. with the idler pulley F and also with the pulley d on the basket spindle D.

The weight lc on the detent lever K normally oscillates such lever so as to lift the rod M and thereby oscillate the bell crank lever N so as to reciprocate the holt O through the hole p in the link P. Consequently, immediately upon the closin of the cover the bolt will automatically ook the same closed. The movement of the bell crank lever toward the right in Withdrawing the bolt from engagement with the link is limited to the stop pin T secured to the rear surface of the water-guard a.

From the foregoing description it will be observed that We have invented improved safety mechanism for centrifugal extractors, and similar machines, by means of which the cover can only be opened b shifting the locking bolt, and that the ocking bolt cannot be so shifted while the basket revolves. It will be further observed that in our improvement the basket can not be driven until the cover has first been closed.

Our invention more specifically involves unlocking mechanism between the cover and one of the rotating members of the power driving mechanism, so that the power driving mechanism cannot operate when the cover is open and the cover cannot be opened -iov extrators', but intend thereby to'protect it A-for whatever usesit may".fbe .adapted and.

11: In a "',entrifugal'.ef'raptrfthe combi-r nation with a basket, offdriying means for rotating said basket, a cover for closing said basket,= and mechanism controlling the opening and closing ofsa1d'cover comprising a l movable detent extending vinto the path Aof spacedrotating parts of the driving means whenthe cover is open, said";detent being -retained in position' to` prevent the cover `being opened by the limpact of' said 'rotat- 2 5 ing parts of the dri-ving'means. 1 2. a centrifugal. ei'tractor, the combinati'onv witha basket, of driving means .for rotating said basket, a cover for closing lsaid'.l nasl\'et,. a bolt-forv locking said cover closed, and means controlled by said driving means. for preventingthe disengagement of said bolt-from Athecover during the rotation of'tliebasket. 1 l g 3. In va :entrifuga-l extractor, thef combination with aro basket,` ofa casing "within 'which saidb sketis inclosed, a'cover pvotally mounted the casing, meansfor rotating vsaid basket,v bolt supported upon `said casing, 'a keeper connected with vsaid 4o cover and moved -th'ereby' into position to be engaged by said bolt only when the cover is closed, and means" connected .with said bolt for preventing tbe operation of the driving means when'the bolt is disengaged vfrom said keeper. i

4,. .ln a. centrifugal extractor, the combination with a rotary basket, of a casing .within which said basket'is inclosed, a cover pivotally mounted on the casing, means for `30 rotating said basket, a bolt pivotally supported upon said casing, a keeper connected with said cover and moved thereby-into position to be engaged by said bolt only when the -cover is closed, and Vmeans controlled iby said driving means for preventing the disengagement of saidbolt from said keeper during the-opcration of tbe dri-ving means.

ln a centrifugal extractor, the combination with a rotary basket. of a casing .'50 in`wbich said basket is inclosed, a cover pivotally mounted on said casing, means for rotating;r said basket, a lbolt mounted upon said casing, a -link connected with and reciprocated by said cover in a path intersecting the path of said bolt` said link when said cover Ais clo's'ed being in position to be engaged by said bolt and when said cover `is open forming' an obstructionto the movement of said bolt, and means connected with said-boltfo'r vpermitting theoperation of said ,driving means only when ,said bolt isin engagementl with said link'.

G Tn a centrifugal extractor', the'c'ox'nbination with a'rotarybask'et, of 'a' cover for closing said basket, means `for rotating said basket, a bolt forloeking 'sa'd cove'rlelosed,

- a bell crank lever operatively cnnectcd with vsaid bolt', a movab saidf bell crankleve'r. and ex'texidin e., detent connected with `into the path ofspaced otatingpartsott jn xeans for rotating the basl'cetf'whenth' `co'ver'is open, said detent being reta 'edby the irn-V pactof said rotating parts: in p fsition to i actuate said b ell crank leverfto` prevent the Y unlocking ofs'aid bolt. y 8'5l 7. In a: centrifugal extractor,' t l1e' com.-

bination with a rotary basket, off-a (:asing 'inclosing' said" basket, a cover'-'pivotally mounted on said casing, a. bolt/for -lockingf said -cover closed, drivmg'lne'an's `for ro'tat- 9`0' ingsaid basket, a bell Acrank lever pivotally mounted upon said casing.'and.'pperatively connected withv said b'olt,'a reciprocating rod l connected withsaid bell crank 'lever`,''a mov- "able detent operatively,connected-with-said 9:15

rod 'and` extendingfinto fthe' `pathio-f "spaced rotating parts ot-fthe driv-ing-means 'when the -cover is open, said vdetent' being retained by the zimpact otsaidirotating 'parts in .l

position .'tof'cause 'said rodi-and'- bell cran'klOG lever t'o -retain said bolt.iii-lockedfposition.

'8. In a. centrifugal. .extrac tor,.ffthe combinationwith a rotary basket, of casing inclosing said lmslit-A .a cove otall'y mounted onsaidfcasin 1 bolt for locking 105 saidcover closed, driving fmeans for"rot atingsaid basket, a bell icrankflever' pivotally mounted upon said easing and operatively connected with said b olt, a. reciprocating rod connected with said bell cranlclever, a 11G detent' lever pivotally connected with said rod, and a projection onv a member of said driving -means having. a path intersecting the path of said detentlever, thereby preventing the movement of said detent lever 115. necessary to` permit said cover to be unlocked.

'9. In a centrifugal extractor, the combination with a vrotary basket, of a cover 'for said basket, driving means for rotat- 120 ing said basket comprising a belt and e. pulley engaged by the belt, a projection or. said pulley, locking means for retaining the cover closed, and a detent operatively connected with said locking means and extending into the path of said projection'when the cover is unlocked.

10. In a centrifugal extractor, the combination with a rotary basket, of a cover for said basket, driving means for retatmounted upon said casing and operatively connected Awith''.said'bolt,4 a ,reciprocating L rod connected with said bell crank lever, drivingmeans for rotating said basket comprising a belt, and 'anidler pulleyv engaged by the-b'elt, studs projecting laterally from the spokes of said pulley, and a, detent lever pivotallyconnected with said rod and extending into vthe said, bolt is in un to said cove'r.' i 1 l 12. In a centrifugal extractor, .the combination with aV cas1ng,`,ofr a rotary basket -within said casing,- a cover for said casing, a link connected with and reeiprocated by said cover, a"bolt mounted yi1 onf-Said casing and having a path intersecting the path of said link, said when said Vcover is closed being 'in'a position to beengaged-'by said bolt,'and whn'said'co'ver is 'open forming an obstruction to the movement ofsaidbolt, a bell crank lever pivotallymountd upon ocked Aposition relatively said casing and pperatively connected With' said bolt, a reciprocating rod connected with said *bell Acrank lever, driving means for rotating said' basket comprising a belt4 belt, studs-carand a pulley engaged bythe ried by' said pulley, and a datent lever piva cover for said casing,

et said studs vwhen in intQ the path of said studs when said bo t is disengaged from said link.

13 In a centrifugal extractor, the combination with a rotary basket, of a coverV fos said basket, driving means for rotating said basket comprising a belt and a pulley engagedvby the belt, and means for preventing the opening of said cover during'the rotation of the basket comprisinga movable detent extending into .the path of rigid rotary portions'ofsalid pulley when the cover is open, said detent being retained in position byl the impact of the said rigid portions of the pulley to prevent the cover being .opened during the rotation of the basket.

14. In a centrifugal extractor, the combination with -a rotaryba'sket, of a cover for said basket, a vertical spindle u on which said basketv is supported, a pu ley fixed to said spindle, a driving belt engaging said pulley to rotate said spindle and basket, a pair -of-guide pulleys supported upon the extractor base around which the driving belt passes to and from the spindle pulley, a movable detent supported adjacent one of said guide pulleys and ada ted to'project into the path of rotation of Xed portion of said guide pulley, a rod operatively connected to said detent at its lower =end, and means connected to the upper end of said rod to Acontrol closing of said cover. y WILLIAM BARTHoLoMEW.

4JAMES, F. BRODERICK. FRITZ Witnesses:

C.l M'. LEABY, F. C. `Vl/'HrrMonn the opening and 

